I am looking to buy a new set of cordless phones to replace faulty old ones. Bought them 3-4 years back, no more warranty. (haha actually not me, my mum tell me to buy)

Currently eyeing on the Panasonic and Philips DECT phones. Saw a advert(siemens i think) featuring phones with SMS feature. How do u use them actually? Need extra service? Or use mobile plans?

Anyone with experience plz give me opinions